For LG SM5KD series (WebOS v3.2 / WebOS 3+):
If your screen is set to Portrait mode in the Digital Signage app settings, pushing the Home button on the remote will not open the menu.
TIP: Push the YELLOW button on the remote to open the Digital Signage app
If you need to access the LG menu:
- Press the EXIT button on the remote to exit out of the app, access the TV settings, and then open the app again (via the Home menu)
- Open the app settings (yellow button on remote), uncheck 'Portrait Mode' and save. Access the Home or Settings menu and put the app back in portrait mode when your updates are complete.